Seasonality (Details)	6 Months Ended
Jun. 30, 2011
Seasonality [Abstract]
Percentage of annual revenues occur during first six months of the year, minimum (in hundredths)	52.00%
Percentage of annual revenues occur during first six months of the year, maximum (in hundredths)	55.00%

Name:

aste_AnnualRevenueSeasonalTrendForFirstSixMonthsOfYearLowerPercentageRange

Namespace Prefix:

aste

Data Type:

num:percentItemType

Balance Type:

na

Period Type:

duration